Method and apparatus for selectively blocking radio frequency (RF) signals in a radio frequency (RF) switching circuit
US7443269B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 27, 2005 |
| Grant date | Oct 28, 2008 |
| Priority date | — |
| Expiry date | Jul 6, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/74
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An RF switching circuit that incorporates a film bulk acoustic resonator (FBAR) device and one or more capacitors that are used to vary the capacitance of the FBAR device to change the frequency range that is blocked by the FBAR device. When the RF switching circuit is in a first switching state, a first set of RF signals in a first frequency range is blocked by the RF switching circuit while RF signals of other frequencies are passed by the RF switching circuit. When the RF switching circuit is in a second switching state, a second set of RF signals in a second frequency range is blocked by the RF switching circuit while RF signals of other frequencies are passed by the RF switching circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.